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A TEST ON GRAND UNIFIED THEORY.

对大统一理论的检验。

基本信息

批准号：
60420008
负责人：
ITO Nobuo
金额：
$ 21.31万
依托单位：
OSAKA CITY UNIVERSITY.
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (A)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1987
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60420008/
关键词：
Underground Physics New Particle Magnetic Monopole 陽子崩壊地下深部重い長寿命粒子

项目摘要

New calorimetre type detector (Phase III) used large proportional counters constructed at the depth of 6,045 hg/cm^2. From the observation of Phase 1,11 and 111, we have obtained next results.(1) Prompt muons ; From the angular distribution of muons, we derived energy spectrum of muons upto energy 250 TeV. Comparing this spectrum with and without effect of sec <THETA>, we estimated the ratio of prompt muons as about 6x10^<-4> with 30 % error.(2) Multiple parallel muons ; From decoherence curve of parallel muons, transverse momentum of secondary particles produced by interaction of primary energy around 10^<16>eV can be estimated. Estimated value is about factor two higher (1 GeV/c) than that value compared with the primary energy of 10^9 - 10^<14> eV region.(3) Massive long lived particles ; Three candidate events have been recorded.Though it is difficult to interpret these phenomena with present knowledge, but one interpretation is that neutrino like particle may interact within rock … More and produced new particle of mass about a few GeV and life time of about 10^<-9> sec.(4) Magnetic monopole ; Massive and slowly moving monopole has been searched by three methods of particle ionisation, Rubakov effect and time of flight. No candidates have been recorded and this lead to the flux of upper limit as about 5 x 10^<-15>/cm^2sec str. for 10^<-3><<beta><1.(5) Proton decay ; With total observation of 0.55 K.Ton.Year, we have obtained nine nucleon decay candidates and two neutron oscillation events which estimated as pair annihilation phenomena. Though statistics is poor, but characteristic feature in decay mode of nucleons is that out of them six events are decayed into K meson like P -><nu> K^+ seems to suggest that super symmetry type theory may favour for nucleon decay.(6) Neutrino Astronomy ; Muons observed with zenith angle<greater than or similar>60゜ are induced by neutrino in rock. From them arrival direction have checked. At present, no statistically meaningfull source cas poor, bu Less

新型量热式探测器（第三阶段）使用了深度为 6,045 hg/cm^2 的大型正比计数器。通过对1,11和111相的观察，我们得到了以下结果。(1)瞬态μ子；根据μ子的角分布，我们推导出μ子的能谱，最高能量为250 TeV。比较有和没有秒<THETA>影响的谱图，我们估计瞬发μ子的比例约为6x10^<-4>，误差为30％。（2）多个平行μ子；从平行μ子的退相干曲线，可以估计由10^ 16 eV左右的一次能量相互作用产生的二次粒子的横向动量。与 10^9 - 10^<14> eV 区域的一次能量相比，估计值大约比该值高出两倍 (1 GeV/c)。(3) 大量长寿命粒子；已记录了三个候选事件。虽然用现有知识很难解释这些现象，但一种解释是类中微子粒子可能在岩石内相互作用并产生质量约为几GeV、寿命约为10^<-9>秒的新粒子。(4)磁单极子；通过粒子电离、鲁巴科夫效应和飞行时间三种方法搜索了巨大且缓慢移动的单极子。没有记录候选者，这导致通量上限约为 5 x 10^<-15>/cm^2sec str。对于 10^<-3><<beta><1。(5) 质子衰变；经过0.55 K.Ton.Year的总观测，我们获得了9个核子衰变候选者和2个估计为对湮灭现象的中子振荡事件。虽然统计数据较差，但核子衰变模式的特征是其中有六个事件衰变为K介子，如P -><nu> K^+ 似乎表明超对称型理论可能有利于核子衰变。（6）中微子天文学；天顶角<大于或相似>60゜观测到的μ子是由岩石中的中微子诱发的。从他们那里检查了到达方向。目前，没有统计上有意义的来源 cas 差，bu 少